Lean Six Sigma Green Belt Certification Lean Six Sigma Green Belt Control Phase and Sustainment Questions and Answers 2 — Questions and Answers
Question 1: Which tool is most commonly used in the Control phase to monitor process performance over time?
- Control chart (Correct answer)
- Pareto chart
- Fishbone diagram
- Scatter plot
Correct answer: Control chart
Control charts track process variation over time and signal when a process goes out of statistical control.
Question 2: What is the primary purpose of a reaction plan in the Control phase?
- To define corrective actions when a process goes out of control (Correct answer)
- To celebrate project completion milestones
- To assign blame for process failures
- To document lessons learned from the Define phase
Correct answer: To define corrective actions when a process goes out of control
A reaction plan specifies the immediate steps to take when monitoring detects an out-of-control condition.
Question 3: Which document transfers process ownership from the project team to the process owner?
- Control plan (Correct answer)
- Project charter
- SIPOC diagram
- Voice of the Customer report
Correct answer: Control plan
The control plan formally documents the monitoring strategy and transfers ongoing responsibility to the process owner.
Question 4: What does MSA stand for in the context of the Control phase?
- Measurement System Analysis (Correct answer)
- Management Strategy Assessment
- Mean Standard Average
- Monthly Status Audit
Correct answer: Measurement System Analysis
Measurement System Analysis evaluates the accuracy and precision of the measurement system used to monitor the improved process.
Question 5: Which type of control chart would you use to monitor the proportion of defective items in samples of varying size?
- p-chart (Correct answer)
- X-bar and R chart
- c-chart
- I-MR chart
Correct answer: p-chart
The p-chart is designed to track the proportion of nonconforming units and accommodates variable subgroup sizes.
Question 6: What is the best approach to ensure long-term sustainment of process improvements?
- Standardize the improved process and train all stakeholders (Correct answer)
- Rely on the project leader to manually check results weekly
- Keep the improvement details confidential to prevent resistance
- Avoid updating SOPs until the next audit cycle
Correct answer: Standardize the improved process and train all stakeholders
Standardizing procedures and training stakeholders embeds improvements into daily operations, ensuring they persist beyond the project.
Lean Six Sigma Green Belt Certification Lean Six Sigma Green Belt Control Phase and Sustainment Questions and Answers 2
Which tool is most commonly used in the Control phase to monitor process performance over time?